DMX died from a cocaine-induced heart attack that left the rapper "brain dead," according to Vulture.
The world was shocked after DMX suffered an overdose at his home on April 2 and was rushed to the hospital.
The Ruff Ryders rapper passed away one week later.
"It was a cardiac arrest for a period of time, so there was no circulation to the brain," a source from the Westchester County medical examiner's office told Vulture.
The insider also revealed that acute cocaine intoxication “caused this chain of events.”
An analysis of DMX's urine reportedly found traces of cocaine.
The medical examiner's office did not perform an autopsy on the rapper, as medical professionals and police allegedly provided documentation that had already confirmed the cause of death.
Despite their attempts to revive DMX at the scene, Vulture's source says it was no use.
“His death literally happened immediately because the brain was dead,” they claimed.
“So obviously, there were a number of days where he was on ventilatory support and so forth in the hospital,” the insider explained. “However, he was diagnosed brain-dead early on … He never woke up from [a] coma.”
The Party Up (Up In Here) rapper -- whose real name was Earl Simmons -- died on April 9 in Westchester County, New York. He was 50 years old.
After his passing, his family released an emotional statement.
"We are deeply saddened to announce today that our loved one, DMX, birth name of Earl Simmons, passed away at 50 years old at White Plains Hospital with his family by his side after being placed on life support for the past few days. Earl was a warrior who fought till the very end," they said.
"He loved his family with all of his heart and we cherish the times we spent with him. Earl’s music inspired countless fans across the world and his iconic legacy will live on forever. We appreciate all of the love and support during this incredibly difficult time," the family continued. "Please respect our privacy as we grieve the loss of our brother, father, uncle, and the man the world knew as DMX."